bin_PROGRAMS += vppapigen
-# We cannot rely on BUILT_SOURCES here as other built sources are relying
-# on vppapigen, so make can start compiling lex.c before gram.h is created.
-# This way we introduce new dependency by running C preprocessor.
-
-tools/vppapigen/lex_e.c: tools/vppapigen/lex.c tools/vppapigen/gram.y
+tools/vppapigen/gram.h: tools/vppapigen/gram.y
@$(YACC) -d @srcdir@/tools/vppapigen/gram.y
@mv y.tab.h tools/vppapigen/gram.h
@rm y.tab.c
- @$(CC) -I. -E -o $@ $<
-vppapigen_SOURCES = tools/vppapigen/gram.y tools/vppapigen/lex_e.c tools/vppapigen/node.c
+tools/vppapigen/lex.o: tools/vppapigen/gram.h
+tools/vppapigen/node.o: tools/vppapigen/gram.h
+
+vppapigen_SOURCES = tools/vppapigen/gram.y tools/vppapigen/lex.c tools/vppapigen/node.c
vppapigen_LDADD = libvppinfra.la
vppapigen_LDFLAGS = -static
+CLEANFILES += tools/vppapigen/gram.c tools/vppapigen/gram.h
# vi:syntax=automake